olefiant gas

olefiant gas
/oh'leuh fuy"euhnt, oh lee"fee-, oh lef"ee-/
ethylene (def. 2).
[1800-10; part trans. of F gaz oléfiant, equiv. to olé- ( < L oleum OIL) + -fiant, prp. of -fier -FY; see -ANT]

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